four american presidents there. along with 90 world leaders. much more from that coming up. >>> we're going to switch gears. and get to the strange story. a texas district attorney, fighting for her job after she was arrested for drunk driving. all of her behavior caught on tape. and despite that, she says she is refusing to resign. >>> and we have a diet soda shocker. new research that people are making the switch away from the low-calorie carbonated drinks. we're going to look at why they're not as popular as they used to be. >> a sea change in the beverage industry. >>> also -- ♪ "downton abbey." a lot of excitement, especially at the other end of this desk. the cast joining us. and look what they've brought. the tea truck, already rolled up. we're taking your questions, they are taking our orders. and we'll have it all for you. please, again, send us the questions on twitter and facebook. we'll get quality time with the downton folk. >> all going to be here in a little bit. >>> right now, we begin with the newlywed murder trial out of mon